CN111174275B - Anti-freezing control method and anti-freezing system of wall-mounted boiler - Google Patents
Anti-freezing control method and anti-freezing system of wall-mounted boiler Download PDFInfo
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- CN111174275B CN111174275B CN201911413006.0A CN201911413006A CN111174275B CN 111174275 B CN111174275 B CN 111174275B CN 201911413006 A CN201911413006 A CN 201911413006A CN 111174275 B CN111174275 B CN 111174275B
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- 238000007710 freezing Methods 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 361
- 239000008236 heating water Substances 0.000 claims abstract description 121
- 238000003287 bathing Methods 0.000 claims abstract description 109
- 238000010438 heat treatment Methods 0.000 claims abstract description 59
- 239000000523 sample Substances 0.000 claims description 17
- 230000002528 anti-freeze Effects 0.000 claims description 14
- 230000008014 freezing Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
- F24D19/1069—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water regulation in function of the temperature of the domestic hot water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
Abstract
The invention discloses an anti-freezing control method and an anti-freezing system of a wall-mounted boiler, wherein the anti-freezing control method comprises the following steps: s1, starting the wall-mounted boiler, collecting the outlet water temperature of the heating water, and judging whether to enter a heating anti-freezing mode according to the outlet water temperature; s2, when the heating and anti-freezing mode is started, heating water for heating is heated until the water outlet temperature reaches a preset temperature threshold value, and then the heating and anti-freezing mode is stopped and the zero-cold-water anti-freezing mode is started; s3, when entering a zero cold water anti-freezing mode, starting a bathing water pump, and detecting the water flow value of a bathing waterway; s4, judging whether to start the burner or not according to the water flow value in the S3; s5, when the burner is started, the burner heats the bathing water, the water inlet temperature and the water outlet temperature of the bathing water are respectively detected, and then the state of the wall-hanging stove is determined according to the water inlet temperature and the water outlet temperature. According to the wall-mounted boiler anti-freezing control method, the wall-mounted boiler can perform heating anti-freezing and zero-cold-water anti-freezing, and the effectiveness of the zero-cold-water function is improved.
Description
Technical Field
The invention relates to the technical field of wall-mounted furnaces, in particular to an anti-freezing control method and an anti-freezing system of a wall-mounted furnace.
Background
The wall-mounted boiler for heating and bathing in the market generally has an antifreezing function only for a heating module, and a bathing module has a zero cold water function only, so that after the heating is started, the bathing function is used again, the local water temperature of bathing is influenced by the temperature of the heating, the local high temperature of bathing water is caused, the temperature detection of the bathing water is misled, the zero cold water function failure is caused, or when the bathing water inlet temperature is lower, the bathing water pipe is frozen and cracked.
Disclosure of Invention
In order to solve the problems, the invention provides an anti-freezing control method of a wall-mounted boiler, which can overcome the defect that the temperature of the heated water influences the local water temperature of the bath, can perform heating anti-freezing and zero-cold-water anti-freezing, and improves the effectiveness of the zero-cold-water function; the invention also provides an anti-freezing system applying the anti-freezing control method.
The technical scheme adopted by the invention is as follows:
an anti-freezing control method for a wall-mounted boiler which is a dual-purpose wall-mounted boiler for heating and bathing comprises the following steps:
s1, starting the wall-mounted furnace, collecting the water outlet temperature of the heating water, and judging whether the wall-mounted furnace enters a heating anti-freezing mode according to the water outlet temperature of the heating water;
s2, when the wall-mounted boiler enters the heating and anti-freezing mode, heating the heating water until the water outlet temperature reaches a preset temperature threshold, and then exiting the heating and anti-freezing mode and entering a zero-cold-water anti-freezing mode;
s3, when the wall-mounted boiler enters a zero-cold-water anti-freezing mode, a bathing water pump of the wall-mounted boiler is started, and the current water flow value of a bathing water path is detected;
s4, judging whether to start the burner according to the water flow value in the S3;
s5, when the burner is started, the burner heats the bathing water, the water inlet temperature and the water outlet temperature of the bathing water are respectively detected, and then the state of the wall-hanging stove is determined according to the water inlet temperature and the water outlet temperature of the bathing water.
And in the step S1, whether the wall-mounted boiler enters a heating anti-freezing mode is judged according to the water outlet temperature of the heating water, and the method specifically comprises the following steps:
s1.1, when the outlet water temperature of the heating water is between a first preset temperature value and a second preset temperature value, entering a heating first-stage anti-freezing mode, and starting a heating water pump;
when the outlet water temperature of the heating water is less than or equal to a first preset temperature value, entering a heating secondary anti-freezing mode, and entering S2;
when the outlet water temperature of the heating water is lower than the third preset temperature value, respectively detecting the inlet water temperature and the outlet water temperature of the bathing water, and entering S1.2;
s1.2, when the inlet water temperature or the outlet water temperature of the bathing water is between a first preset temperature value and a fourth preset temperature value, entering a heating secondary anti-freezing mode; when the water inlet temperature or the water outlet temperature of the bathing water is less than or equal to a fourth preset temperature value, entering an anti-icing mode;
the fourth preset temperature value T4, the first preset temperature value T1, the second preset temperature value T2, and the third preset temperature value T3 have the following size relationships: t4 < T1 < T2 < T3.
In the above technical scheme, when the wall-mounted boiler enters the heating anti-freezing mode in S2, the heating water is heated until the outlet water temperature reaches the preset temperature threshold, and then the heating anti-freezing mode exits and the zero-cold-water anti-freezing mode enters, specifically:
s2.1, when the wall-mounted boiler enters a heating secondary anti-freezing mode, the heating water pump and the burner are started to heat heating water;
s2.2, when the outlet water temperature of the heating water reaches a preset temperature threshold, exiting the heating secondary anti-freezing mode; otherwise, returning to S2.1 until the outlet water temperature of the heating water reaches a preset temperature threshold;
and S2.3, when the outlet water temperature of the heating water in the S2.2 reaches a preset temperature threshold, entering a zero-cold-water anti-freezing mode.
In the above technical solution, the heating water pump and the burner are turned on in S2.1, which specifically includes:
the method comprises the steps of firstly, starting a heating water pump, and starting a burner after the heating water pump runs for a certain time to prevent or avoid damage to a water pipe caused by uneven water temperature of heating water.
In the above technical solution, the judging whether to turn on the burner in S4 according to the water flow value in S3 specifically includes:
when the water flow value reaches a preset water flow threshold value, the burner is started to heat the bath water; otherwise, the zero cold water anti-freezing mode is exited, and the bathing water pump is stopped.
In the above technical solution, the burner heats the bathing water to the target temperature T in S5Target temperatureThe following conditions are satisfied:
when the temperature set for bathing is greater than the preset bathing temperature threshold value, the target temperature TTarget temperatureIs a preset bathing temperature threshold value; conversely, the target temperature TTarget temperatureThe temperature is set for bathing.
In the above technical solution, when the burner is turned on in S5, the burner heats the bath water, and detects the water inlet temperature and the water outlet temperature of the bath water, and then determines the state of the wall-hanging stove according to the water inlet temperature and the water outlet temperature of the bath water, specifically:
s5.1, when the burner is started, the burner heats the bath water and detects the outlet water temperature of the bath water;
s5.2, when the outlet water temperature of the bath water reaches the target temperature T within a continuous period of timeTarget temperatureIf so, entering S5.4; otherwise, detecting the water inlet temperature of the bath water;
s5.3, when the burner runs for a certain time, the water inlet temperature of the bathing water reaches T within a continuous period of timeTarget temperature-TReturn differenceIf so, entering S5.4; otherwise, entering S5.2;
s5.4, stopping the burner, continuing to operate the bathing water pump for a certain time, and when the inlet water temperature of the bathing water reaches TTarget temperature-TReturn differenceWhen the wall-mounted boiler exits from the zero cold water anti-freezing mode, the wall-mounted boiler enters a standby state; otherwise, the burner is restarted and S5.2 is entered.
After the zero-cold-water anti-freezing mode exits in the S5.3, the wall-mounted boiler enters a standby state, which specifically comprises the following steps: after the zero-cold-water anti-freezing mode is exited, the bathing water pump stops, and after the heating water pump continues to work for a certain time, the wall-mounted boiler enters a standby state.
An anti-freezing system applying the anti-freezing control method comprises a wall-mounted furnace body, and a burner, a heating water outlet temperature probe, a bathing water inlet temperature probe, a water flow sensor, a heating water pump and a bathing water pump which are arranged in the wall-mounted furnace body;
the burner is used for heating water and bathing water; the heating water outlet temperature probe is used for detecting the water outlet temperature of heating water; the bathing water outlet temperature probe is used for detecting the water outlet temperature of bathing water; the bathing water inlet temperature probe is used for detecting the water inlet temperature of bathing water; the water flow sensor is used for detecting the water flow value of the bath water; the heating water pump is used for driving heating water to flow; the bathing water pump is used for driving the bathing water to flow.
After the technical scheme is adopted, the heating water is heated and prevented from freezing according to the outlet water temperature of the heating water, and the bathing water is heated and prevented from freezing according to the inlet water temperature and the outlet water temperature of the bathing water, so that the wall-mounted boiler can perform heating and freezing prevention as well as zero-cold-water freezing prevention, and the effectiveness of the zero-cold-water function is improved.
Drawings
Fig. 1 is a flowchart of an antifreeze control method of a wall-hanging stove according to the present invention;
FIG. 2 is a schematic view of an antifreeze system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1 and 2, the invention provides an anti-freezing control method for a wall-mounted boiler, the wall-mounted boiler is a dual-purpose wall-mounted boiler for heating and bathing, the wall-mounted boiler comprises a burner 1, a heating water pump 2 and a bathing water pump 3, and the control method comprises the following steps:
s1, starting the wall-hanging stove and collecting the water outlet temperature of the heating water, and judging whether the wall-hanging stove enters a heating anti-freezing mode according to the water outlet temperature of the heating water, wherein the method specifically comprises the following steps:
s1.1, when the outlet water temperature of the heating water is between a first preset temperature value and a second preset temperature value, entering a heating first-stage anti-freezing mode, starting a heating water pump 2, and circulating the heating water;
when the water temperature is lower than a first preset temperature value, the water pipe is possibly frozen, and a second preset temperature value is slightly larger than the first preset temperature value; the heating primary anti-freezing mode has the function of judging whether the outlet water temperature is the real temperature or the local low temperature when the outlet water temperature of the heating water is detected to be close to a first preset temperature value; the method specifically comprises the following steps: when the temperature of the outlet water of the heating water is gradually increased to a set temperature threshold, the outlet water is proved to be locally low temperature, the heating water cannot freeze and crack a pipeline, the heating primary anti-freezing mode is exited, and the wall-mounted boiler enters a standby state; when the temperature of the outlet water of the heating water is not increased and heat is radiated due to continuous circulation until the temperature of the outlet water of the heating water is less than or equal to a first preset temperature value, entering a heating secondary anti-freezing mode and entering S2;
when the outlet water temperature of the heating water is less than or equal to the first preset temperature value, entering a heating secondary anti-freezing mode, and entering S2;
when the outlet water temperature of the heating water is between the second preset temperature value and the third preset temperature value, respectively detecting the inlet water temperature and the outlet water temperature of the bathing water, and entering S1.2; when the water temperature reaches a third preset temperature value, the heating water circulates for one week without freezing a pipeline;
s1.2, when the inlet water temperature or the outlet water temperature of the bathing water is between a first preset temperature value and a fourth preset temperature value, entering a heating secondary anti-freezing mode; when the water inlet temperature or the water outlet temperature of the bathing water is less than or equal to a fourth preset temperature value, the bathing water is frozen, and the anti-freezing mode is entered, namely the bathing mode is stopped; when the water temperature reaches a fourth preset temperature value, the water temperature is in an icing state;
the fourth preset temperature value T4, the first preset temperature value T1, the second preset temperature value T2, and the third preset temperature value T3 have the following size relationships: t4 < T1 < T2 < T3.
S2, when the wall-mounted boiler enters the heating and anti-freezing mode, heating water is heated until the water outlet temperature reaches a preset temperature threshold value, then the wall-mounted boiler exits the heating and anti-freezing mode and enters a zero-cold-water anti-freezing mode, and the method specifically comprises the following steps:
s2.1, when the wall-mounted boiler enters a heating secondary anti-freezing mode, a heating water pump 2 and a burner 1 are started to heat heating water; in this embodiment, at first open heating water pump 2, after heating water pump 2 operation certain time, open combustor 1 again, prevent or avoid heating water's temperature inequality, during the messenger heats, the water pipe is heated poor great to shorten the water pipe life-span, or damage the water pipe.
S2.2, when the outlet water temperature of the heating water reaches a third preset temperature value, exiting the heating secondary anti-freezing mode; otherwise, returning to S2.1 until the outlet water temperature of the heating water reaches a third preset temperature value;
and S2.3, when the outlet water temperature of the heating water in the S2.2 reaches a third preset temperature value, entering a zero-cold-water anti-freezing mode.
And S3, when the wall-mounted boiler enters a zero-cold-water anti-freezing mode, the bathing water pump 3 of the wall-mounted boiler is started, and the current water flow value of the bathing water path is detected.
S4, judging whether to start the burner 1 according to the water flow value in S3; the method specifically comprises the following steps: when the water flow value reaches a preset water flow threshold value, the burner 1 is started to heat the bath water; otherwise, reporting the fault of the bath water pump 3, exiting the zero-cold-water anti-freezing mode, stopping the bath water pump 3, keeping the temperature of the heating water after the heating water pump 2 continues to work for a certain time, and entering S1.2;
s5, when the burner 1 is turned on, the burner 1 heats the water for bathing, and the burner 1 heats the target temperature T of the water for bathingTarget temperatureThe following conditions are satisfied: when the temperature set for bathing is greater than the preset bathing temperature threshold value, the target temperature TTarget temperatureIs a preset bathing temperature threshold value; conversely, the target temperature TTarget temperatureSetting the temperature for bathing;
and respectively detecting the water inlet temperature and the water outlet temperature of the bathing water, and then determining the state of the wall-mounted furnace according to the water inlet temperature and the water outlet temperature of the bathing water, wherein the specific steps are as follows:
s5.1, when the burner 1 is started, the burner 1 heats the bath water, and the outlet water temperatures of the bath water are respectively detected;
s5.2, when the outlet water temperature of the bath water reaches the target temperature T within a continuous period of timeTarget temperatureIf so, entering S5.4; otherwise, detecting the water inlet temperature of the bath water; wherein, TReturn differenceThe temperature is determined according to environmental climate, user habit and the like, and is generally 3 to 15 ℃;
s5.3, when the combustor 1 runs for a certain time, the water inlet temperature of the bathing water reaches T within a continuous period of timeTarget temperature-TReturn differenceIf so, entering S5.4;otherwise, entering S5.2;
s5.4, stopping the burner 1, continuing to operate the bath water pump 3 for a certain time, and when the inlet water temperature of the bath water reaches TTarget temperature-TReturn differenceWhen the wall-mounted boiler is in the zero-cold-water anti-freezing mode, the bathing water pump 3 is stopped, and the wall-mounted boiler enters a standby state after the heating water pump 2 continues to work for a certain time; otherwise, the combustor 1 is restarted and S5.2 is entered; the heating water pump 2 continues to work for a certain time to circulate the heating water for one week and maintain the water temperature.
Example two:
as shown in fig. 1 and 2, a freeze protection control method for a wall-mounted boiler, which is a dual-purpose wall-mounted boiler for heating and bathing, includes a burner 1, a heating water pump 2 and a bathing water pump 3, wherein the heating water pump 2 is an ac water pump, and the bathing water pump 3 is a dc water pump, and the control method includes the following steps:
s1, starting the wall-hanging furnace and collecting the water outlet temperature of the heating water;
s1.1, when the outlet water temperature of the heating water is between 5 ℃ and 8 ℃, entering a heating primary anti-freezing mode, and starting a heating water pump 2 to circulate the heating water;
the heating primary anti-freezing mode has the function of judging whether the outlet water temperature is the real temperature or the local low temperature when the outlet water temperature of the heating water is detected to be close to 5 ℃; the method specifically comprises the following steps: when the temperature of the outlet water of the heating water is gradually increased to 10 ℃, the outlet water is proved to be locally low temperature, the heating water cannot freeze the water pipe, the heating water exits from a heating first-stage anti-freezing mode, and the heating water enters a standby state; when the temperature of the outlet water of the heating water is not increased and the heat is radiated due to continuous circulation until the temperature of the outlet water of the heating water is less than or equal to 5 ℃, entering a heating secondary anti-freezing mode and entering S2;
when the outlet water temperature of the heating water is less than or equal to 5 ℃, entering a heating secondary anti-freezing mode and entering S2;
when the outlet water temperature of the heating water is between 8 ℃ and 25 ℃, respectively detecting the inlet water temperature and the outlet water temperature of the bath water, and entering S1.2;
s1.2, when the water inlet temperature or the water outlet temperature of the bath water is between 1 and 5 ℃, entering a heating secondary anti-freezing mode; and when the water inlet temperature or the water outlet temperature of the bath water is less than or equal to 1 ℃, entering an anti-icing mode.
S2, when the wall-mounted boiler enters the heating and anti-freezing mode, heating water is heated until the water outlet temperature reaches 25 ℃, and then the wall-mounted boiler exits the heating and anti-freezing mode and enters a zero-cold-water anti-freezing mode, specifically:
s2.1, when the wall-mounted boiler enters a heating secondary anti-freezing mode, a heating water pump 2 and a burner 1 are started to heat heating water; in this embodiment, at first open heating water pump 2, after heating water pump 2 operation 2min, open combustor 1 again, prevent or avoid heating water's temperature inequality, during the messenger heats, the water pipe is heated poor great to shorten the water pipe life-span, or damage the water pipe.
S2.2, when the outlet water temperature of the heating water reaches 25 ℃, exiting the heating secondary anti-freezing mode, and stopping the combustor 1; otherwise, returning to S2.1 until the outlet water temperature of the heating water reaches 25 ℃;
and S2.3, when the outlet water temperature of the heating water in the S2.2 reaches 25 ℃, entering a zero cold water anti-freezing mode.
And S3, when the wall-mounted boiler enters a zero-cold-water anti-freezing mode, the bathing water pump 3 of the wall-mounted boiler is started, and the current water flow value of the bathing water path is detected.
S4, judging whether to start the burner 1 according to the water flow value in S3; the method specifically comprises the following steps: when the water flow value reaches 2.5L/min, the burner 1 is started to heat the bath water; otherwise, reporting the fault of the bath water pump 3, exiting the zero-cold-water anti-freezing mode, stopping the bath water pump 3, keeping the temperature of the heating water after the heating water pump 2 continues to work for 30min, and entering S1.2;
s5, when the burner 1 is turned on, the burner 1 heats the water for bathing, and the burner 1 heats the target temperature T of the water for bathingTarget temperatureThe following conditions are satisfied: when the bath set temperature is more than 50 ℃, the target temperature TTarget temperatureIs 50 ℃; conversely, the target temperature TTarget temperatureSetting the temperature for bathing;
and respectively detecting the water inlet temperature and the water outlet temperature of the bathing water, and then determining the state of the wall-mounted furnace according to the water inlet temperature and the water outlet temperature of the bathing water, wherein the specific steps are as follows:
s5.1, when the burner 1 is started, the burner 1 heats the bath water, and the outlet water temperatures of the bath water are respectively detected;
s5.2, when the effluent temperature of the bath water reaches the target temperature T within 5 seconds continuouslyTarget temperatureEntering S5.4 at +7 ℃; otherwise, detecting the water inlet temperature of the bath water; wherein, TReturn differenceThe temperature is determined according to environmental climate, user habit and the like, and is generally 3 to 15 ℃;
s5.3, when the combustor 1 runs for a certain time, the water inlet temperature of the bathing water reaches T within a period of timeTarget temperature-TReturn differenceAt +2 ℃, entering S5.4; otherwise, entering S5.2;
s5.4, stopping the burner 1, continuing to operate the bath water pump 3 for a certain time, and when the inlet water temperature of the bath water reaches TTarget temperature-TReturn differenceWhen the temperature is below-2 ℃, after the zero-cold-water anti-freezing mode is exited, the bathing water pump 3 is stopped, and after the heating water pump 2 continues to work for a certain time, the wall-mounted boiler enters a standby state; otherwise, the combustor 1 is restarted and S5.2 is entered; the heating water pump 2 continues to work for a certain time to circulate the heating water for one week and maintain the water temperature.
As shown in fig. 2, the invention also provides an anti-freezing system applying the anti-freezing control method, which comprises a wall-mounted furnace body 4, and a burner 1, a heating water pump 2, a bathing water pump 3, a heating water outlet temperature probe 5, a bathing water outlet temperature probe 6, a bathing water inlet temperature probe 7 and a water flow sensor 8 which are arranged in the wall-mounted furnace body;
the burner 1 is used for heating water and bathing water; the heating water pump 2 is used for driving heating water to flow; the bath water pump 3 is used for driving bath water to flow; the heating water outlet temperature probe 5 is used for detecting the water outlet temperature of the heating water; the bath water outlet temperature probe 6 is used for detecting the outlet water temperature of the bath water; the bathing water inlet temperature probe 7 is used for detecting the water inlet temperature of the bathing water; the water flow sensor 8 detects a water flow rate value of the bath water.
By the antifreezing control method, heating antifreezing and zero cold water antifreezing can be performed, the effectiveness of the zero cold water function is improved, the temperature of heating water is prevented from influencing the temperature detection of bathing water, and the zero cold water function is disabled; in addition, the water inlet temperature and the water outlet temperature of the bath water are detected to prevent freezing or freezing, so that the bath water pipe is prevented from being frozen and cracked.
The above examples are intended to illustrate rather than to limit the invention, and all equivalent changes and modifications made by the methods described in the claims of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The anti-freezing control method of the wall-mounted boiler is characterized by comprising the following steps of:
s1, starting the wall-mounted furnace, collecting the water outlet temperature of heating water, and judging whether the wall-mounted furnace enters a heating anti-freezing mode according to the water outlet temperature of the heating water;
s2, when the wall-mounted boiler enters the heating and anti-freezing mode, heating water until the water outlet temperature reaches a preset temperature threshold, and then exiting the heating and anti-freezing mode and entering a zero-cold-water anti-freezing mode;
s3, when the wall-mounted boiler enters a zero-cold-water anti-freezing mode, the bathing water pump (3) of the wall-mounted boiler is started, and the current water flow value of a bathing water path is detected;
s4, judging whether to start the burner (1) according to the water flow value in the S3;
s5, when the burner (1) is turned on, the burner (1) heats the bathing water, the water inlet temperature and the water outlet temperature of the bathing water are respectively detected, and then the state of the wall-hanging stove is determined according to the water inlet temperature and the water outlet temperature of the bathing water.
2. The antifreeze control method of claim 1, wherein in step S1, it is determined whether the wall-hanging stove enters a heating antifreeze mode according to the outlet water temperature of the heating water, and the determination is specifically that:
s1.1, when the outlet water temperature of the heating water is between a first preset temperature value and a second preset temperature value, entering a heating first-stage anti-freezing mode, and starting a heating water pump (2);
when the outlet water temperature of the heating water is less than or equal to a first preset temperature value, entering a heating secondary anti-freezing mode, and entering S2;
when the outlet water temperature of the heating water is between a second preset temperature value and a third preset temperature value, respectively detecting the inlet water temperature and the outlet water temperature of the bathing water, and entering S1.2;
s1.2, when the inlet water temperature or the outlet water temperature of the bathing water is between a first preset temperature value and a fourth preset temperature value, entering a heating secondary anti-freezing mode; when the water inlet temperature or the water outlet temperature of the bathing water is less than or equal to a fourth preset temperature value, entering an anti-icing mode;
the fourth preset temperature value T4, the first preset temperature value T1, the second preset temperature value T2, and the third preset temperature value T3 have the following size relationships: t4 < T1 < T2 < T3.
3. The antifreeze control method of claim 2, wherein in step S2, when the wall-hanging stove enters the heating antifreeze mode, the wall-hanging stove heats the heating water until the outlet water temperature reaches a preset temperature threshold, and then exits the heating antifreeze mode and enters the zero-cold-water antifreeze mode, specifically:
s2.1, when the wall-mounted boiler enters a heating secondary anti-freezing mode, the heating water pump (2) and the burner (1) are started to heat heating water;
s2.2, when the outlet water temperature of the heating water reaches a preset temperature threshold, exiting the heating secondary anti-freezing mode; otherwise, returning to S2.1 until the outlet water temperature of the heating water reaches a preset temperature threshold;
and S2.3, when the outlet water temperature of the heating water in the S2.2 reaches a preset temperature threshold, entering a zero-cold-water anti-freezing mode.
4. The antifreeze control method of claim 3, wherein the heating water pump (2) and the burner (1) are turned on in S2.1, specifically:
firstly, a heating water pump (2) is started, and after the heating water pump (2) runs for a certain time, a burner (1) is started to prevent or avoid water pipe damage caused by uneven water temperature of heating water.
5. The antifreeze control method of claim 2, 3 or 4, wherein the judgment of whether to turn on the burner (1) in S4 is based on the water flow value in S3, specifically:
when the water flow value reaches a preset water flow threshold value, the burner (1) is started to heat the bath water; and otherwise, the zero-cold-water anti-freezing mode is exited, and the bathing water pump (3) is stopped.
6. The antifreeze control method of claim 2, 3 or 4, wherein said burner (1) heats bath water to a target temperature T in S5Target temperatureThe following conditions are satisfied:
when the temperature set for bathing is greater than the preset bathing temperature threshold value, the target temperature TTarget temperatureIs a preset bathing temperature threshold value; conversely, the target temperature TTarget temperatureThe temperature is set for bathing.
7. The antifreeze control method of claim 6, wherein in step S5, when the burner (1) is turned on, the burner (1) heats the bath water, the water inlet temperature and the water outlet temperature of the bath water are respectively detected, and then the state of the wall-hanging stove is determined according to the water inlet temperature and the water outlet temperature of the bath water, specifically:
s5.1, when the burner (1) is started, the burner (1) heats the bathing water, and the outlet water temperature of the bathing water is detected;
s5.2, when the outlet water temperature of the bath water reaches the target temperature T within a continuous period of timeTarget temperatureIf so, entering S5.4; otherwise, detecting the water inlet temperature of the bath water;
s5.3, when the burner (1) runs for a certain time, the inlet water temperature of the bathing water reaches T within a continuous period of timeTarget temperature-TReturn differenceIf so, entering S5.4; otherwise, entering S5.2;
s5.4, stopping the burner (1), continuing to operate the bathing water pump (3) for a certain time, and when the inlet water temperature of the bathing water reaches TTarget temperature-TReturn differenceWhen the wall-mounted boiler exits from the zero cold water anti-freezing mode, the wall-mounted boiler enters a standby state; otherwise, the burner (1) is restarted and S5.2 is entered.
8. The antifreeze control method of claim 7, wherein after exiting the zero-cold-water antifreeze mode in S5.3, the wall-hanging stove enters a standby state, specifically: and after the zero cold water anti-freezing mode is exited, the bathing water pump (3) is stopped, and after the heating water pump (2) continues to work for a certain time, the wall-mounted boiler enters a standby state.
9. An anti-freezing system applying the anti-freezing control method of any one of claims 1 to 8, which is characterized by comprising the wall-hanging stove body (4), and a burner (1), a heating water pump (2), a bathing water pump (3), a heating water outlet temperature probe (5), a bathing water outlet temperature probe (6), a bathing water inlet temperature probe (7) and a water flow sensor (8) which are arranged in the wall-hanging stove body;
the burner (1) is used for heating water and bathing water; the heating water pump (2) is used for driving heating water to flow; the bathing water pump (3) is used for driving the bathing water to flow; the heating water outlet temperature probe (5) is used for detecting the water outlet temperature of heating water; the bathing water outlet temperature probe (6) is used for detecting the water outlet temperature of the bathing water; the bathing water inlet temperature probe (7) is used for detecting the water inlet temperature of the bathing water; the water flow sensor (8) is used for detecting the water flow value of the bath water.
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